Word/phrase request for a unique speech style
idiolect
- The speech patterns unique to an individual.
Notes: 1. These speech patterns consist of the diction, idioms, and pronunciations that are unique to any individual, hence everyone
Online Dictionary of Language Terminology
Every person has an idiolect that is influenced by a range of factors including class, family, place of birth, friends, lifestyle, etc. Idiolects usually evolve through contact with other idiolects, and will change over the course of a person´s lifetime.